## Semi-inclusive decays {lambda}{sub b}{yields}X{sub c}+(D{sub s},D{sub s}*) at O(a{sub s}) including {lambda}{sub b} and D{sub s}* polarization effects

In the leading order of the (1/m{sub b})-expansion in HQET the dominant contribution to the semi-inclusive decays of polarized {lambda}{sub b} baryons into the charm-strangeness mesons D{sub s} and D{sub s}* is given by the partonic process b({up_arrow}){yields}c+(D{sub s}{sup -},D{sub s}*{sup -}). Using standard values for the parameters of the process one expects a rather large branching ratio of {approx_equal}8% into these two channels. In the factorization approximation the semi-inclusive decay of a polarized {lambda}{sub b} is governed by three unpolarized and four polarized structure functions for which we determine the nonperturbative O(1/m{sub b}{sup 2}) corrections and the O({alpha}{sub s})more »